Ewing was chosen as the 43rd overall pick in the
2008 NBA draft by the
Sacramento Kings. Soon afterwards, he signed a contract with the Kings. He was later traded to the
Houston Rockets in a five-player deal that brought
Ron Artest to the Rockets. On August 29, 2008, Ewing followed his father's footsteps once again when he was traded to the
New York Knicks in exchange for the rights of former first round pick
Frédéric Weis. After some initial speculation that he would wear his father's retired number 33, Ewing took number 6 in honor of his favorite player,
Bill Russell, which was also his father's number in his final season in the NBA with the
Orlando Magic and on the
1992 Olympic national team. Ewing played in two Knicks preseason games prior to making his New York debut in the Knicks' final pre-season game on October 24, 2008. Ewing entered the game in the fourth quarter to a thunderous ovation by the
Madison Square Garden crowd. Ewing helped fuel the Knicks' late rally, where the Knicks would come back from a 21-point deficit. Ewing had two dunks, a three-pointer, a steal and a blocked shot. He had seven fourth quarter points. In total, he played three pre-season games for the Knicks, averaging 8.1 minutes, 3.7 points and 1.7 rebounds. On October 27, 2008, Ewing was waived by the Knicks in order to get the roster down to the maximum of 15 players for the start of the
2008–09 season. Ewing was signed by Knicks'
D-League affiliate, the
Reno Bighorns, on December 15, 2008. On the day he signed, Ewing made his D-League debut against
Utah Flash, recording 15 points. After his first 30 games with the Bighorns, Ewing averaged 16.8 points, 8.9 rebounds, 3.1 assists, 1.5 steals and 1.3 blocks per game with an efficiency rating of +20.00. On March 16, 2009, the Reno Bighorns waived Ewing after he reportedly suffered a Grade 1 MCL (medial collateral ligament) sprain. Ewing was named to the New York Knicks roster for the 2009 NBA Summer League in Las Vegas, but was unable to participate due to injury. Ewing played for the
Orlando Magic in the
2010 NBA Summer League in Orlando, as well as for the Knicks in Las Vegas. On August 27, 2010, Ewing signed with the Knicks. However, he was once again waived at the end of training camp. He was then re-acquired by the
Reno Bighorns of the NBA D-League. On January 25, 2011, he was traded to the
Sioux Falls Skyforce for
Danny Green. On March 26, the
New Orleans Hornets signed Ewing to a 10-day contract following the injury of
David West. On April 5, he was signed for the remainder of the season. On December 13, 2011, he was waived by the Hornets. In January 2012, Ewing returned to the Sioux Falls Skyforce. On February 9, Ewing was acquired by the
Iowa Energy in a trade for
Marqus Blakely. On July 4, 2012, Ewing signed a one-year contract with the
Telekom Baskets Bonn of the German
Bundesliga. He was released from his contract in December 2012. On January 9, 2013, Ewing signed with
Blancos de Rueda Valladolid of the Spanish
Liga ACB. On March 19, he parted ways with the Valladolid. In July 2013, Ewing joined the
Charlotte Bobcats for the
2013 NBA Summer League. On September 28, 2013, he signed with the
Greek League club
Trikala Aries for the 2013–14 season. In September 2014, he signed with
Nea Kifissia of Greece. On January 5, 2015, he parted ways with Nea Kifisia. Later in 2015, he joined
Al Rayyan of the
Qatari Basketball League. ==Coaching career==